Abstract:Abstract:The slag network structure model of CaO-Al2O3-B2O3-MgO quaternary slag system was constructed by Scigress molecular dynamics software. The influence of different MgO content on the microstructure of CaO-Al2O3-B2O3-MgO quaternary slag system was systematically studied. Studies have shown that high-coordinated Al and tri-coordinate oxygen appear in the slag to compensate for [AlO4]5-tetrahedral negative charge excess; boron as the network forming body has the strongest binding ability with O, and its coordination structure is Tri-coordinated trigonal and tetra-coordinated tetrahedrons exist; MgO acts as a network modifier to compensate for charge and depolymerization networks. With the increase of MgO content, the stability of the Al-O network structure is enhanced, but the polymerization degree of the melt is decreasing.
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